/* =========================================================
   Dharani Minerals — Site stylesheet
   ========================================================= */

/* ----- Design tokens ----- */
:root {
  --color-anthracite: #141414;
  --color-warm-white: #FAF7F2;
  --color-pure-white: #FFFFFF;
  --color-oxide: #8B3A1C;
  --color-oxide-light: #D4824B;
  --color-charcoal: #2D2A26;
  --color-stone: #6B6660;
  --color-hairline: #E8E3D9;

  --font-serif: 'Fraunces', 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --container-max: 1200px;
  --container-pad: 1.5rem;

  --transition: 200ms ease;
}

/* ----- Reset & base ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-charcoal);
  background: var(--color-warm-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ----- Layout ----- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ----- Typography helpers ----- */
.kicker {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--color-oxide);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.kicker-light { color: var(--color-oxide-light); }

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-anthracite);
}
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-header .section-title { max-width: 720px; margin: 0 auto; }

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--color-warm-white);
  color: var(--color-anthracite);
  border-color: var(--color-warm-white);
}
.btn-primary:hover {
  background: transparent;
  color: var(--color-warm-white);
}
.btn-dark {
  background: var(--color-anthracite);
  color: var(--color-warm-white);
  border-color: var(--color-anthracite);
}
.btn-dark:hover {
  background: transparent;
  color: var(--color-anthracite);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 1px solid currentColor;
  color: var(--color-anthracite);
  transition: gap var(--transition);
}
.btn-link:hover { gap: 12px; }
.btn-link-light { color: var(--color-warm-white); }

/* ----- Header ----- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(20, 20, 20, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(250, 247, 242, 0.06);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.125rem;
  padding-bottom: 1.125rem;
}
.brand {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-warm-white);
  letter-spacing: 0.005em;
}
.site-nav { display: flex; gap: 2rem; }
.nav-link {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-warm-white);
  opacity: 0.6;
  transition: opacity var(--transition);
  padding: 4px 0;
}
.nav-link:hover, .nav-link.active { opacity: 1; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 26px;
  padding: 4px 0;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--color-warm-white);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ----- Hero ----- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(20, 20, 20, 0.55) 0%,
    rgba(20, 20, 20, 0.35) 40%,
    rgba(20, 20, 20, 0.78) 100%);
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 3;
  padding-top: 8rem;
  padding-bottom: 5rem;
  max-width: 740px;
}
.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-warm-white);
  margin-bottom: 1.5rem;
}
.hero-sub {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.6;
  color: rgba(250, 247, 242, 0.85);
  max-width: 560px;
  margin-bottom: 2.5rem;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ----- Stats ----- */
.stats {
  background: var(--color-pure-white);
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--color-hairline);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.stat-number {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  line-height: 1;
  color: var(--color-anthracite);
}
.stat-number .accent { color: var(--color-oxide); }
.stat-label {
  font-family: var(--font-sans);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-stone);
  margin-top: 0.625rem;
  text-transform: uppercase;
}

/* ----- Pillars (Mission/Plan/Vision) ----- */
.pillars { padding: 6rem 0; }
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}
.pillar-card {
  background: var(--color-pure-white);
  border: 1px solid var(--color-hairline);
  transition: transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
}
.pillar-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px -8px rgba(20, 20, 20, 0.08);
}
.pillar-image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.pillar-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}
.pillar-card:hover .pillar-image img { transform: scale(1.04); }
.pillar-body { padding: 2rem 1.75rem; }
.pillar-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-anthracite);
  margin-bottom: 1rem;
}
.pillar-body p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-charcoal);
}

/* ----- Product teaser ----- */
.product-teaser {
  padding: 6rem 0;
  background: var(--color-pure-white);
  border-top: 1px solid var(--color-hairline);
  border-bottom: 1px solid var(--color-hairline);
}
.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.product-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.product-content .section-title { margin-bottom: 1.5rem; }
.product-content p {
  margin-bottom: 1rem;
  line-height: 1.7;
  color: var(--color-charcoal);
}
.product-content .btn-link { margin-top: 1.5rem; }

/* ----- Footer ----- */
.site-footer {
  background: var(--color-anthracite);
  color: var(--color-warm-white);
  padding-top: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
}
.footer-heading {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-oxide-light);
  margin-bottom: 1.25rem;
}
.footer-text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(250, 247, 242, 0.72);
  margin-bottom: 1rem;
}
.footer-text:last-child { margin-bottom: 0; }
.footer-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: rgba(250, 247, 242, 0.45);
  text-transform: uppercase;
}
.footer-map {
  width: 100%;
  height: 160px;
  border: 0;
  border-radius: 2px;
  margin-bottom: 1rem;
  filter: grayscale(0.4);
  opacity: 0.9;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}
.footer-links a {
  font-size: 0.875rem;
  color: rgba(250, 247, 242, 0.72);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--color-warm-white); }

.footer-bottom {
  border-top: 1px solid rgba(250, 247, 242, 0.08);
  padding: 1.5rem 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom p {
  font-size: 0.75rem;
  color: rgba(250, 247, 242, 0.5);
  margin: 0;
}
.footer-bottom a {
  color: rgba(250, 247, 242, 0.75);
  border-bottom: 1px solid currentColor;
}
.footer-bottom a:hover { color: var(--color-warm-white); }

/* ----- Animations ----- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 700ms ease-out backwards; }
.fade-in-1 { animation-delay: 100ms; }
.fade-in-2 { animation-delay: 250ms; }
.fade-in-3 { animation-delay: 400ms; }
.fade-in-4 { animation-delay: 550ms; }

/* ----- Responsive ----- */
@media (max-width: 960px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 2.5rem 1.5rem; }
  .pillars-grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .product-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
}
@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-anthracite);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.5rem 1rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
    border-bottom: 1px solid rgba(250, 247, 242, 0.06);
  }
  .site-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .site-nav .nav-link {
    padding: 0.875rem 0;
    border-bottom: 1px solid rgba(250, 247, 242, 0.06);
    opacity: 0.85;
  }
  .site-nav .nav-link:last-child { border-bottom: none; }
  .hero-content { padding-top: 6.5rem; padding-bottom: 4rem; }
  .hero-actions { gap: 1.25rem; }
  .pillars, .product-teaser { padding: 4rem 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}

/* ----- Reduced motion ----- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================================
   Inner pages — header, components added in batch 2
   ========================================================= */

/* ----- Page header (inner pages) ----- */
.page-header {
  padding: 9rem 0 4rem;
  background: var(--color-warm-white);
  border-bottom: 1px solid var(--color-hairline);
  text-align: center;
}
.page-header .kicker { margin-bottom: 1rem; }
.page-header-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-anthracite);
  margin-bottom: 1rem;
}
.page-header-sub {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-stone);
  max-width: 640px;
  margin: 0 auto;
}

/* ----- About: synergy ----- */
.synergy { padding: 5rem 0; background: var(--color-pure-white); }
.synergy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.synergy-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.synergy-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.2;
  color: var(--color-anthracite);
  margin-bottom: 1.25rem;
}
.synergy-content p { line-height: 1.7; color: var(--color-charcoal); }

/* ----- About: tabs ----- */
.tabs-section { padding: 5rem 0; background: var(--color-warm-white); }
.tabs-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--color-hairline);
  margin-bottom: 3rem;
}
.tab-btn {
  padding: 1.25rem 1rem;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-stone);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: -1px;
}
.tab-btn:hover { color: var(--color-anthracite); }
.tab-btn.active {
  color: var(--color-anthracite);
  border-bottom-color: var(--color-oxide);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeInUp 400ms ease-out; }
.tab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.tab-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.625rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.35;
  color: var(--color-anthracite);
  margin-bottom: 1.5rem;
}
.tab-text { line-height: 1.7; color: var(--color-charcoal); }
.tab-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ----- Specs strip (manganese) ----- */
.specs-strip {
  padding: 3rem 0;
  background: var(--color-anthracite);
  color: var(--color-warm-white);
}
.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 2rem;
}
.spec { display: flex; flex-direction: column; gap: 0.4rem; }
.spec-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-oxide-light);
  text-transform: uppercase;
}
.spec-value {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--color-warm-white);
}

/* ----- Products grid (manganese) ----- */
.products { padding: 5rem 0; background: var(--color-warm-white); }
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.product-card {
  background: var(--color-pure-white);
  border: 1px solid var(--color-hairline);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px -8px rgba(20, 20, 20, 0.1);
}
.product-card-image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-warm-white);
}
.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}
.product-card:hover .product-card-image img { transform: scale(1.04); }
.product-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}
.product-card-label {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-oxide);
  text-transform: uppercase;
}
.product-grade {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-anthracite);
  line-height: 1;
}
.product-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.875rem;
  color: var(--color-stone);
  padding: 0.875rem 0;
  border-top: 1px solid var(--color-hairline);
  border-bottom: 1px solid var(--color-hairline);
}
.product-meta strong { font-weight: 500; color: var(--color-charcoal); }
.product-meta strong.unavailable { color: var(--color-stone); font-weight: 400; font-style: italic; }
.product-card .btn { align-self: flex-start; margin-top: 0.25rem; }

/* ----- Forms ----- */
.form-section { padding: 5rem 0; background: var(--color-warm-white); }
.form-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-pure-white);
  padding: 2.5rem;
  border: 1px solid var(--color-hairline);
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-stone);
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-charcoal);
  background: var(--color-warm-white);
  border: 1px solid var(--color-hairline);
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-anthracite);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3e%3cpath d='M3 4.5L6 7.5L9 4.5' stroke='%236B6660' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-row .form-group { margin-bottom: 0; }
.form-row + .form-group { margin-top: 1.25rem; }
.form-submit { margin-top: 1.75rem; }
.form-status {
  margin-top: 1.25rem;
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  line-height: 1.5;
  display: none;
}
.form-status.show { display: block; }
.form-status.success {
  background: rgba(139, 58, 28, 0.06);
  border-left: 3px solid var(--color-oxide);
  color: var(--color-anthracite);
}
.form-status.error {
  background: rgba(198, 40, 40, 0.06);
  border-left: 3px solid #c62828;
  color: #c62828;
}

/* ----- Contact info ----- */
.contact-info { padding: 5rem 0 0; background: var(--color-warm-white); }
.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}
.info-box {
  background: var(--color-pure-white);
  border: 1px solid var(--color-hairline);
  padding: 1.75rem;
}
.info-box-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-oxide);
  margin-bottom: 0.75rem;
}
.info-box-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-anthracite);
  margin-bottom: 0.75rem;
}
.info-box-text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-charcoal);
}
.info-box-text a { border-bottom: 1px solid currentColor; }
.info-box-text a:hover { color: var(--color-oxide); }

/* ----- Gallery ----- */
.gallery { padding: 5rem 0; background: var(--color-warm-white); }
.gallery-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--color-hairline);
}
.filter-btn {
  padding: 1rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-stone);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: -1px;
}
.filter-btn:hover { color: var(--color-anthracite); }
.filter-btn.active {
  color: var(--color-anthracite);
  border-bottom-color: var(--color-oxide);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-anthracite);
  cursor: pointer;
}
.gallery-item.hidden { display: none; }
.gallery-item img,
.gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease, opacity var(--transition);
}
.gallery-item:hover img,
.gallery-item:hover video { transform: scale(1.05); opacity: 0.88; }
.gallery-item-tag {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  background: rgba(20, 20, 20, 0.65);
  color: var(--color-warm-white);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.375rem 0.625rem;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

/* ----- Lightbox ----- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 20, 0.94);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.lightbox.open { display: flex; }
.lightbox-content { max-width: min(1200px, 100%); position: relative; }
.lightbox-content img,
.lightbox-content video {
  max-width: 100%;
  max-height: 88vh;
  display: block;
}
.lightbox-close {
  position: absolute;
  top: -3rem;
  right: 0;
  background: transparent;
  border: none;
  color: var(--color-warm-white);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  transition: opacity var(--transition);
}
.lightbox-close:hover { opacity: 0.7; }

/* ----- Responsive overrides for batch 2 ----- */
@media (max-width: 960px) {
  .synergy-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .tab-grid { grid-template-columns: 1fr; gap: 2rem; }
  .tabs-nav { grid-template-columns: repeat(2, 1fr); }
  .page-header { padding: 7rem 0 3rem; }
}
@media (max-width: 640px) {
  .form-card { padding: 1.75rem 1.25rem; }
  .form-row { grid-template-columns: 1fr; gap: 1.25rem; }
  .tabs-nav { grid-template-columns: 1fr; }
  .tab-btn { padding: 1rem; text-align: left; border-bottom: 1px solid var(--color-hairline); }
  .tab-btn.active { border-bottom-color: var(--color-oxide); }
  .filter-btn { padding: 0.875rem 1rem; font-size: 11px; }
  .synergy, .tabs-section, .products, .form-section, .gallery { padding: 3.5rem 0; }
}